Energy recovery system for droop compensation circuitry
First Claim
1. A voltage regulator for regulating voltage supplied to a circuit, comprising:
- means for regulating a voltage supplied to the circuit, the means for regulating including a voltage input and a voltage output;
means for compensating for a voltage droop that occurs over a time; and
means for providing energy recovery from the voltage output to the voltage input.
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Accused Products
Abstract
The invention comprises a voltage regulator including a droop compensation circuit and an energy recovery circuit. The droop compensation circuit adjusts the regulator output voltage to compensate for droop, such as voltage regulator droop, load transistor droop, or other variations to droop that occur in a load circuit over time. The droop compensation circuit compensates for voltage droop by providing an adjusted voltage input to the voltage regulator. The energy recovery circuit permits excess energy at the output of the voltage regulator to be transferred from the voltage output of the regulator to a voltage input of the regulator upon completion of a transmit gate during which the droop compensation circuit is operative. The energy recovery circuit can reduce heat generation and improve power efficiency and reliability.
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Citations
38 Claims
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1. A voltage regulator for regulating voltage supplied to a circuit, comprising:
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means for regulating a voltage supplied to the circuit, the means for regulating including a voltage input and a voltage output;
means for compensating for a voltage droop that occurs over a time; and
means for providing energy recovery from the voltage output to the voltage input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A voltage regulator for regulating voltage supplied to a circuit, comprising:
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a voltage regulator having a voltage input and a voltage output;
a droop compensation circuit for compensating a voltage droop that occurs over a time; and
an energy recovery circuit for reducing the voltage output following the end of a transmit gate. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. An energy recovery circuit for use with a voltage regulator, comprising:
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means for controlling a switch that engages an energy recovery phase;
means for transferring energy from a voltage output of the regulator to a voltage input of the regulator;
wherein the means for controlling initiates the switch at or following the end of a transmit gate. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. An energy recovery circuit for use with a voltage regulator, comprising:
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a controller for controlling a switch that initiates energy recovery;
the switch comprising an active switching device;
an inductor coupled between a voltage output of the voltage regulator and a voltage input of the voltage regulator; and
an isolation device coupled between the voltage output and the voltage input. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification